In the second graph you can notice there are many more high IQs individuals using firefox and chrome rather than opera.
You can also notice that as IQ increases, the numbers of Firefox, Chrome, and Safari users eventually peak, but the number of Opera users never does.
So it's not sampling bias, per se, but...I guess it's something along those lines?
1. People who pioneer the use of alternative browsers always have high intelligence.
2. However, some browsers lack the ability to appeal to anyone beyond that initial market.
So know the graph is just saying things we already knew. Opera has a tiny fanclub, but the browser doesn't appeal to many people, or Opera fans are just bad at evangelizing to their friends. Meanwhile Chrome and Firefox have a much greater mainstream presence, and hence an attenuated average IQ.
So Opera's concentration among intelligent users isn't an indication of quality, but rather, some problem in their marketing approach.
On OSX, despite its memory leaks and crashing, the OS integrations of Safari can't be beat, the multi touch zooming, and the new lion features... I can put up with a crash or two a day.
And besides I like the feel of a high horse being at the to of that chart :P
Agreed. If what being smart gets me is Opera, I'd rather be dumb!
I kid, I kid!
The really surprising thing for me was Opera. You can't explain that with mere willingness to update or try something new.